Several moments went by, one of the big Jacks pawed at the ground with his hooves and another looked behind him, as if to check the rear for a surprise attack.
过了好一会儿，其中一只大公驴用蹄子刨地，另一只回头望向他，似乎在检查后面那只是否会突然袭击。
2
The main-beams of the lower deck had to be shored with screw-jacks forthwith.